Ignition switch of gas stove

ABSTRACT

An ignition switch has a switch member with a closed device therein, a knob and an electromagnetic valve a driving device. The knob is provided on the switch member for driving the closed device. The switch member further is provided with a chamber, in which a driving device is received. The driving device connects the knob and the electromagnetic valve, whereby the electromagnetic valve is activated while the knob is pressed.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates generally to a gas stove and moreparticularly to an ignition switch of the gas stove.

2. Description of the Related Art

A conventional ignition switch mounted in a gas stove has a closeddevice and an electromagnetic valve. While user turns a knob of thestove, it drives a shaft of the closed device pushing a plug of theelectromagnetic valve for gas flowing to a burner of the stove forburning. After that, a heater, which electrically connects theelectromagnetic valve, generates current to activate the electromagneticvalve according to the heat of the burner.

In the conventional ignition switch, the electromagnetic valve isarranged next to the closed device, so that the ignition switch has agreater length. As a result, the stove has to provide sufficient lengthin height or in width to receive the ignition switch. In other words,the conventional ignition switch makes the stove large.

For an improved ignition switch, the electromagnetic valve is arrangedperpendicular to the closed device to reduce the length thereof.Typically, there are two types of that. First, a coupler is provided toconnect the shaft of the closed device and the plug of theelectromagnetic valve. The plug of the electromagnetic valve isactivated by the shaft of the closed device via the coupler while theknob is turned. The ignition switch has to change the orientation of thegas channel, so that the switch is totally different from theconventional switch and that increases the cost. Second, a transmissiondevice is provided to connect the knob and the electromagnetic valve.The electromagnetic valve is activated by the knob via the transmissiondevice. The transmission device is installed independently that might beeasy to be impacted and damaged in assembly. There is no ignition switchin the present market without any drawback.

SUMMARY OF THE INVENTION

The primary objective of the present invention is to provide an ignitionswitch of a gas stove, which the gas channel is kept as the conventionalone and the transmission device will not be impacted and the length ofthe switch is decreased.

According to the objectives of the present invention, an ignition switchcomprises a switch member, a knob, an electromagnetic valve and adriving device. The switch member has a closed device therein and achamber in which the driving device is received. The knob is provided onthe switch member for driving the closed device. The driving deviceconnects the knob and the electromagnetic valve, whereby theelectromagnetic valve is activated while the knob is pressed.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a front view of a first preferred embodiment of the presentinvention;

FIG. 2 is a rear view of the first preferred embodiment of the presentinvention;

FIG. 3 is top rear view of the first preferred embodiment of the presentinvention;

FIG. 4 is a sectional view along the 4-4 line of FIG. 3;

FIG. 5 is perspective view of the pushing member of the first preferredembodiment of the present invention;

FIG. 6 is a sectional view of the first preferred embodiment of thepresent invention, showing the motion of the driving device, and

FIG. 7 is a rear view of a second preferred embodiment of the presentinvention.

DETAILED DESCRIPTION OF THE INVENTION

As shown in FIG. 1 to FIG. 5, an ignition switch 10 of the firstpreferred embodiment of the present invention comprises a switch member12, a closed device 13 in the switch member 12, a knob 14 at an end ofthe switch member 12 to drive the closed device 13, an electromagneticvalve 16 beside the switch member 12 and an ignition device 17. Theseelements are as same as the conventional one, so I'll not describe thedetail. The characters of the present invention are described hereunder:

The switch member 12 has a base 22 and a cap 24. The base 22 has a gasinlet 221, a gas tube 222, a first gas tube 223, a second gas tube 224,a receiving tube 225 and a cone valve chamber 226. The base 22 furtherhas a chamber 26, which has a first chamber 28 on a top thereof, asecond chamber 30 communicated with the first chamber 28 and thereceiving tube 225 and a order hole 31 communicated with the firstchamber 28. The closed device 13 is mounted in the valve chamber 226,the electromagnetic valve 16 is mounted in the receiving tube 225 andthe knob 14 is mounted on the cap 24.

The switch 10 of the present invention further comprises a drivingdevice 18 mounted in the chamber 26, which has a driving member 32, atransmission member 34 and a pushing member 36.

The driving member 32 has a main member 40 on which a hole 42 isprovided to fit a shaft 38 of the knob 13 and a pressing portion 44projected from the main member 40.

The transmission member 34 has a beam 46 and an elastic device 48. Theshaft 46 is inserted in the first chamber 28 having a post 50, a firstblock 52 at a bottom end of the post 50 and a second block 54 at a topend of the post 50 to be connected to the pressing portion 44. Theelastic device 48 is a spring 48 fitted to the post 50 between thesecond block 54 and a pad plate 56 mounted in the order hole 31. AnO-ring is mounted in the order hole 31 connected to a bottom thereof.The O-ring 58 is fitted to the post 50 to prevent gas from leakage outof the first chamber 28.

The pushing member 36 is received in the second chamber 30 having abarrel-like base portion 60, a pushing portion 62, a plug 161 on thebase portion 60 to be connected to the electromagnetic valve 16, apositioning portion 64, which is a slot, and an inclined stop portion 66in the positioning portion 64. The first block 52 of the beam 46 isconnected to the stop portion 66 and is restricted by the positioningportion 64, so that the first block 52 is restricted between the stopportion 66 and the positioning portion 64.

As shown in FIG. 6, while the knob 14 is pressed, the shaft 38 is moveddownward to drive the beam 46 of the transmission member 34 downward. Inthe meantime, the first block 52 of the beam 46 pushes the pushingmember 36 to activate the electromagnetic valve 16 for gas flowing to aburner of the stove. While the knob 14 is moved back to its originalposition, the shaft 38 is moved upward and the elastic device 48 forcesthe beam 46 and the driving member 32 upward. As a result, the pushingmember 36 is moved back to its original portion by the electromagneticvalve 16.

The ignition switch 10 of the present invention, under a circumstance ofnot changing the gas channel of the conventional ignition switch,provides the chamber 26 and the driving device 18 in the switch member12 and beside the closed device 13 to control the electromagnetic valve16. To compare with the conventional ignition switch as described above,the ignition switch 10 of the present invention has a shorter length,which helps the stove to decrease the size thereof and to use the spacein the stove more flexible. In addition, the present invention has lesscomponents to prevent the transmission device form being impacted anddamaged.

As shown in FIG. 7, an ignition switch 70 of the second preferredembodiment of the present invention, which is similar to the ignitionswitch 10 of the first preferred embodiment, except that a base 71 ofthe second preferred embodiment is different from the base 22 of thefirst preferred embodiment. The base 71 has a gas inlet 72 on areceiving tube 74. The ignition switch 70 of the second preferredembodiment works as same as the ignition switch 10 of the firstpreferred embodiment.

The scope of the ignition switch of the present invention should notrestricted in the specification and the drawings. The present inventioncan be applied to any type of stove.

In conclusion, the ignition switch of the present invention stillapplies the conventional switch member and the electromagnetic valveunder the circumstance of not changing the gas channel of theconventional ignition switch and has a shorter length, which helps thestove to decrease the size thereof and to use the space in the stovemore flexible. In addition, the present invention prevents thetransmission device form being impacted and damaged.

1. An ignition switch, comprising: a switch member, in which a closeddevice and a chamber are provided; a knob provided on the switch memberfor driving the closed device; an electromagnetic valve, and a drivingdevice received in the chamber of the switch member to connect the knoband the electromagnetic valve, whereby the electromagnetic valve isactivated while the knob is pressed.
 2. The ignition switch as definedin claim 1, wherein the driving device has a driving member connected toa shaft of the knob, a transmission member movably mounted in thechamber of the switch member with an end thereof connected to thedriving member and a pushing member mounted between the electromagneticvalve and the pushing member.
 3. The ignition switch as defined in claim1, wherein the switch member has a base and a cap secured to the base,the closed member is provided in the base, the electromagnetic valve ona side of the base, the knob is provided on the cap and the chambercommunicated with the cap and the electromagnetic valve.
 4. The ignitionswitch as defined in claim 3, wherein the chamber has a first chamberand a second chamber connected with each other and the second chamber isopen at an end thereof and the transmission member is received in thefirst chamber and the pushing member is received in the second chamber.5. The ignition switch as defined in claim 1, wherein the driving memberhas a main member fixed to a shaft of the knob, a pressing portion on aside of the main member to be connected to the transmission member. 6.The ignition switch as defined in claim 5, wherein the main member has ahole to be fitted to the shaft of the knob.
 7. The ignition switch asdefined in claim 5, wherein the pressing portion is projected outwardlyfrom the main member.
 8. The ignition switch as defined in claim 2,wherein the transmission member is moveable in the switch member and isexerted by a spring force.
 9. The ignition switch as defined in claim 8,wherein the transmission member has a beam with an end thereof receivedin the chamber and an end thereof connected to the driving member, anelastic device mounted between the end the beam connected to the drivingmember and an interior wall of the switch member.
 10. The ignitionswitch as defined in claim 9, wherein the beam has a post a first blockon an end of the post to be connected to the pushing member and a secondblock on an end of the post to be connected to the driving member. 11.The ignition switch as defined in claim 10, wherein the pushing memberhas a base portion, a pushing portion on the base portion facing theelectromagnetic valve and a stop portion on the base portion to beconnected to the transmission member.
 12. The ignition switch as definedin claim 10, wherein the switch member has an order hole communicatedwith the first chamber and an O-ring mounted in the order hole forleakproof.
 13. The ignition switch as defined in claim 11, wherein thepushing member has a positioning portion at an end thereof facing thestop portion.